A Numerical Simulation of an Experimental Prediction Method for Railway Induced Vibration in Buildings
Ground borne vibration in buildings due to railway traffic is a major concern in densely built up areas. In practice,railway induced vibration is often predicted by means of empirical meth -ods such as the Detailed Vibration Assessment developed by the U. S. Federal Railroad Administration (FRA). The vibration velocity level in a building is predicted based on a separate characteriza -tion of the source, the wave propagation and the receiver. They are characterized by a force density , a line transfer mobility and a coupling loss factor , respectively. While the line transfer mobility is determined directly with in situ measurements of transfer functions ,the force density and the coupling loss factor are obtained indirectly. They are influenced , however ,by several parameters such as the dynamic soil properties. In this paper, the influence of the soil properties on the experimental de -termination of the coupling loss factor is investigated by means of a numerical simulation of the FRA procedure. The results show that the soil has a large influence on the coupling loss factor , as the reduction of the vibration velocity level between the free field and the foundation is affected by the rel -ative stiffness of the building and the soil.
Hans VERBRAKEN Stijn FRANC OIS Geert DEGRANDE Geert LOMBAERT
Structural Mechanics Division , Department of Civil Engineering ,K.U.Leuven,Kasteelpark Arenberg 40,3001 Heverlee,Belgium
国际会议
5th International Symposium on Environmental Vibration(第五届环境振动国际研讨会)
成都
英文
217-223
2011-10-20（万方平台首次上网日期，不代表论文的发表时间）